Bushing.



G. E. CLEMENS.

BUSHING. APPLICATION FILED my 5, 1913.

Patented Oct. 13, 1914.

6/. ZZEZ Him/E5555: CPO? UNITED STATES CHESTER E. CLEMENS,:OF CLEVELAND,OHIO.

BUSHING.

7 Specification of'Letters Patent.

Patented Oct. 13, 1914.

, Application filed May 5, 1913. Serial No. 765.523.

is not only extremely efiicient, but which can be produced at acomparatively small-expense.

Self-lubricating bushings, as most' ordinarily constructed, consist of acast metal cylindrical body having grooves on the initerior thereof.These bushings are not only expensive as compared with those which it isthe object of this'invention to produce,-

but are limited, through foundry practice,

as to the angular inclination of the grooves.

By the construction disclosed herein, I am enabled to produce a bushingwhich is not only efiicient in operation and cheap of pro duction but inwhich any angular inclination may be given to the slots or grooves inthe interior of the bushing.

Generally speaking the invention may be defined as consisting of thecombinations of elements embodied in the claims annexed hereto andillustrated in the drawings forming part hereof wherein:

Figure 1 represents a longitudinal sectional View taken through abushing constructed in accordance with my invention, the section beingtaken on the line l1 of Fig. 2; Fig. 2 is a transverse, sectional viewtaken through such bushing and the eye of a spring to which the bushingmay be applied; Fig. 3 is a plan view of the slotted blank from whichthe inner member of the bushing is formed.

Describing by reference characters the various parts illustrated herein,a denotes a sheet metal blank fro-m which the. inner member of thebushing is formed. This blank is rectangular in shape and is providedwithin the edges thereof with parallel inclined slots 6. These slotsterminate short of the sides and ends of the blank, leaving a lateralimperforate margin 0 at each end of the blank and a similar imperforatemargin d at the top and bottom of the blank.

The slotted apertures b extend entirely .through the blank a and may beconveniently and cheaply formed by punching. The blank is then rolledinto tubular form and forced into a sleeve 6, constituting the outermember of the bushing. This sleeve may be a piece of tubing, or it maybe formed by rolling a piece of metal into tubular form with the endsabutting, as indicated at f in Fig. 2', In such case, care will be takenthat the joint at f is angularly spaced from the joint d formed betweenthe lateral edges of of the inner or lining member of the bushing.

As will appear more particularly from Fig. 1, the ends of thereinforcing or outer member 6 are preferably outwardly beveled, as shownat 6 and the ends 0 of the inner or lining member are spun outwardlyinto engagement with these inclines thereby looking the lining member ofthe bushing securely in place. When the inner or lining member of thebushing is inserted in place, the slotted apertures b may be filled withgraphite or other lubricant, indicated at 70.

In Fig. 2 the bushing is shown as applied to an eye 9 of a spring, thebushing extending through said eye and receiving there within the springbolt h. This bolt may be suspended from shackles, one of which isindicated at While the bushing is shown as applied to a spring, this isonly one of numerous uses to which it may be applied.

By the construction described herein, it will be apparent that I haveproduced a metal bushing of the self-lubricating type which is extremelysimple of construction and efficient in operation. The slots 6 arepreferably so inclined as to make any angle not in excess of ten degreeswith respect to the edges 03, as such angle has been found to be bestsuited for preserving the lining against crushing byvthe inclosed pin aswell as insuring the spreading of the lubricant over the spaces betweenthe slots. This action will be apparent from an inspection of Fig. 3,wherein the line AA indicates the pressure line of the pin against theliner or inner member of the bushing. It will be apparent from thisillustration. that the pressure line' may extend across the entirelength of the bushing between two of the slots without intersectingeither of them and 1 i that it will never simultaneously the ends oftwo. slots adjacent to theedges 0,

' as shown in Fig. 2, and at the same time to bring the ends well withinthe flared portrons, whereby a suiiicient body of metal is providedbeyond these ends to withstand the crushing action of the pin.

While my bushing is advantageous in other relations, it is especiallyadapted for use where a rocking or reciprocatory rotary movement isimparted to the internal pin, bolt or shaft. By its use amplelubrication is afforded for the pin, bolt or shaft, the lubricant beingspread through the spaces between the slots and serving to lubricatethese spaces sufiiciently while, owing to the arrangement of theperforations or slots, the liner sleeve is fully capable of withstandingthe crushing action to which it is subjected by the said pin, bolt orshaft.

Having thus described my invention, what I claim is:

1. A bushing comprising an inner tubular member having aperturesextending therethrough and an outer reinforcing .member surrounding theinner member and closing the outer ends of said apertures, saidapertures being arranged in lines which are inclined to the axis of theinner member, the

A solid metallic bearlng forthe,

inclination of the lines being such with reference to the length of theinner member that the axial pressure line exerted against the innermember will intersect but one line at any time.

2. A bushing comprising an inner tubular -member having inclined slotsextending therethrough and an outer reinforcing member surrounding theinner member and closmg the outer ends of the slots, the inclination ofthe slots to the axis of the said inner member and the length of theslots being such that the axial pressure line within the interior of theinner member will intersect but one slot at any time.

3. A bushing comprising an inner tubular member having inclined slotsextending therethrough and an outer reinforcing'member surrounding theinner member and closing the outer ends of the slots, the inclination ofthe said slots to the axis of the inner member and the length of theslots relative to the length of the inner member being such that theaxial ressure line Within the inner member will intersect but one of theslots at any time, the ends of the inner member being extended beyondthe slots providing elongated surfaces therebeyond against which axialpressure can be exerted without collapsing the innermember.

In testimony whereof, I hereunto afiix my signature in the presence oftwo witnesses.

' CHESTER E. CLEMENS. Witnesses:

JOHN B. HULL, ALBERT H. BATES.

